A tightening heat dome over the interior United States will drive oppressive temperatures through Monday, exposing a substantial share of the population to high heat.
The heaviest dome is anchoring over the Rockies and Plains, while heat advisories persist for portions of southern Colorado and several Midwestern states.
Thunderstorms may spark up in scattered areas but will offer scant relief from the sweltering heat.
Forecasters warn the dome's intensity will delay cool fronts and extend record-breaking conditions right through next week.
Residents are urged to drink water often, limit outdoor exposure during peak hours, and check on neighbors as the stretch of searing heat settles in over the central half.